You should be able to edit the due date and payment terms after bill entry.

Issue No: AP-1400
Created 7/22/2015 9:44:45 PM
Type Feature
Priority Major
Status Closed
Resolution Fixed
Fixed Version 15.3
Description after a bill is entered the customer would like to change the payment terms   * changing the due date is fine - should have no issue * change the discount date should also be fine - please let me know if you see an issue wiht changing terms of the bill and comments without unposting and reposting.